Muscle damage following repeated bouts of high force eccentric exercise.
Muscle damage following repeated bouts of high force eccentric exercise.
复制标题
反复进行高强度离心运动后肌肉损伤。
DOI：
10.1249/00005768-199509000-00005
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发表时间：
1995
影响因子：
4.1
通讯作者：
P. Clarkson
中科院分区：
文献类型：
--
作者：
K. Nosaka;P. Clarkson
这项研究的目的是检验一个假设，即在肌肉没有从先前的锻炼中恢复过来的情况下，重复进行离心锻炼会加剧肌肉损伤。12名非负重训练的男性（21.7 +/- 2.4岁）使用哑铃进行了三组手肘屈肌（ECC）的10个离心动作，哑铃设置为运动前最大等长力量水平的80%。在第一次运动后3和6 d重复相同的运动。评估最大等长力量、放松和屈曲肘关节角度、肌肉酸痛、血浆肌酸激酶和谷草转氨酶活性。超声图像取自上臂。这些措施（除酸痛）进行评估之前和之后立即每次离心运动回合（ECC 1，ECC 2和ECC 3）和ECC 3后3天。在ECC 1之前评估疼痛，此后每天一次，持续9 d。ECC 1后，所有标准测量值均发生显著变化（P < 0.01）。ECC 2和ECC 3在ECC 1后3和6天进行，没有加重损伤，也没有减缓恢复速度。ECC 1后超声图像回声强度增加，但ECC 2和ECC 3后未发现损伤增加的迹象。对“受损”肌肉进行剧烈运动不会加剧损伤或影响修复过程。
This study was designed to test the hypothesis that performing repeated bouts of eccentric exercise when muscles were not recovered from previous exercise would exacerbate muscle damage. Twelve nonweight-trained males (21.7 +/- 2.4 yr) performed three sets of 10 eccentric actions of the elbow flexors (ECC) using a dumbbell that was set at 80% of the preexercise maximal isometric force level. This same exercise was repeated 3 and 6 d after the first exercise. Maximal isometric force, relaxed and flexed elbow joint angle, muscle soreness, plasma creatine kinase, and glutamic-oxaloacetic transaminase activities were assessed. Ultrasound images were taken from the upper arm. These measures (except soreness) were assessed immediately before and after each eccentric exercise bout (ECC1, ECC2, and ECC3) and 3 d after ECC3. Soreness was assessed prior to ECC1 and once a day for 9 d thereafter. All criterion measures changed significantly (P < 0.01) after ECC1. ECC2 and ECC3 performed 3 and 6 d after ECC1 did not exacerbate damage and did not appear to slow the recovery rate. Increased echointensity in ultrasound images was demonstrated following ECC1, but no indication of increased damage was found after ECC2 and ECC3. Strenuous exercise performed with "damaged" muscles did not exacerbate damage or affect the repair process.